build failure trying to use nikola with ipython notebook.

gistfile1.txt

(nikola)blake@quadrilateral:~/cowlicks$ nikola build
Scanning posts..Traceback (most recent call last):
  File "/home/blake/.virtualenvs/nikola/local/lib/python2.7/site-packages/doit/doit_cmd.py", line 103, in run
    return self.sub_cmds[command].parse_execute(args)
  File "/home/blake/.virtualenvs/nikola/local/lib/python2.7/site-packages/doit/cmd_base.py", line 60, in parse_execute
    return self.execute(params, args)
  File "/home/blake/.virtualenvs/nikola/local/lib/python2.7/site-packages/doit/cmd_base.py", line 226, in execute
    args)
  File "/home/blake/.virtualenvs/nikola/local/lib/python2.7/site-packages/nikola/main.py", line 87, in load_tasks
    tasks = generate_tasks('render_site', self.nikola.gen_tasks('render_site', "Task"))
  File "/home/blake/.virtualenvs/nikola/local/lib/python2.7/site-packages/doit/loader.py", line 237, in generate_tasks
    for task_dict, x_doc in flat_generator(gen_result, gen_doc):
  File "/home/blake/.virtualenvs/nikola/local/lib/python2.7/site-packages/doit/loader.py", line 22, in flat_generator
    for item in gen:
  File "/home/blake/.virtualenvs/nikola/local/lib/python2.7/site-packages/nikola/nikola.py", line 629, in gen_tasks
    for task in flatten(pluginInfo.plugin_object.gen_tasks()):
  File "/home/blake/.virtualenvs/nikola/local/lib/python2.7/site-packages/nikola/nikola.py", line 623, in flatten
    for t in task:
  File "/home/blake/.virtualenvs/nikola/local/lib/python2.7/site-packages/nikola/plugins/task_render_pages.py", line 43, in gen_tasks
    self.site.scan_posts()
  File "/home/blake/.virtualenvs/nikola/local/lib/python2.7/site-packages/nikola/nikola.py", line 694, in scan_posts
    self.config['PRETTY_URLS'],
  File "/home/blake/.virtualenvs/nikola/local/lib/python2.7/site-packages/nikola/post.py", line 113, in __init__
    source_path))
OSError: You must set a title (found '"\n",'), a slug (found 'ufunc_overrides') and a date (found 'None')! [in file posts/ufunc_overrides.ipynb]
(nikola)blake@quadrilateral:~/cowlicks$